Carbureter for motor-cars



A. MAIRE; CARBUBETER FOR MOTOR CARS.

APPLICATION HLED SEPT-25, I917. 1,368,178. V Patented Feb. 8, 1921.

2 SHEETSSHEET I.

IN VEN TO R fll/yU676 Ala/he.

his ATTORNEY.

A. MAIRE.

CARBURETER FOB MOTOR CARS.

APPLICATION FILED SEPT-25, 1917.

Patented Feb. 8, 1921.

2 SHEETSSHEET z.

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INVENTORI 'flu usfe Ma e.

his ATTORNEY UNITED STATES PATENT OFFICE.

AUGUSTE MAIRE, 0F ARGENTEUIL, FRANCE, ASSIGNOR TO SOCIETE LORRAINE DES ANCIENS ETABLISSEMENTS DE DIETRICH- & CIE. DE LUNEVILLE, OF PARIS,

FRANCE.

CARBUBIETER FOR MOTOR-CARS.

Application filed September 25,1917. Serial No. 194,159.

To all whom it may concern:

Be it known that I, AUGUSTE MAiRE, citizen of the Republic of France, residin at Route de Bezons, Argenteuil, Seine-etise, in the Republic of France, have invented new and useful Improvements in Carbureters for Motor-Cars, of which the following is a specification.

In designing a carbureter for a motor car, if it is desired to maintain the maximum turning moment of the engine at a hi h speed of revolution, it is necessary to ma e the various cross sections of the carbureter (nozzle, piping) of large dimensions. In such a case however it is difficult to assure a suitable working of the engine at low speeds, especially such as those which must not be exceeded when traveling through towns.

The present invention has for its object to provide'an improved construction of carbureter that will satisfy the above stated requirement.

This invention consists essentially in providing a suitable number of carbureting units for use when the motor is running at a high speed, and a smaller auxiliary carbureting unit for use when the engine is running at a low speed. The main carbureting units each supply a-given number of cylinders, and their number will vary with the number of cylinders of the engine. In all cases, the carbureting units are arranged in' such a manner as to form one piece and they are fed from a common tank. The sprayer for use when the engine is running dead slow, is connected to the pipe of the auxiliary carbureting unit, and the devices for shutting off the explosive mixture may be operated by any suitable means, such as for example, a single pedal or a number of independent pedals.

In the annexed drawings given by way of example:

Figure'l is an end view of an installation in accordance with the invention.

Fig. 2 is a corresponding side view.

Fig. ,3- is 'a corresponding'plan view.

According to the present invention, assuming the case of an engine having s1x cylinders, one group of three cylinders would be fed by'an admission pipe A and the other group by an admission pipe A In the admission pipes A, A which are Specification of Letters Patent.

extendin in a rod mounted upon the shaft M which carr es the throttle valves N, N of the main car-- Patented Feb. 8, 1921.

open at their lower ends, are respectively arranged the fuel nozzles P, P, which are both connected to a common constant level tank 0 by conduits Q, Q provided in lateral extensions of the fuel tank. Throttle valves N, N are respectively mounted in the admission pipes A, A upon a common shaft M. The admission pipe A and fuel nozzle P form one carbureting unit, both units being in operation in normal running. To these two carbureting units, is added a thlrd auxiliary carbureting unit of smaller dimensions which has for its purpose to feed the six cylinders when the engine should work at a moderate speed, for instance 1n' traveling through towns. Said auxiliary carbureting unit comprises an ad- II11SS1OI1 pipe B in communication with a branch conduit B which is connected at its section which is connected at the top with a small sprayer T intended for use in dead slow running; said sprayer T opens into the dead slow admission pipe Cwhich is conn'ectedfat the top with the auxiliary admission pipe B.

Thecontrol of the carbureter may be arranged in various ways, for instance the accelerator pedal may operate through a cam D- the throttle V controlling the low speed carburetor B, said throttle being mounted 'uponan axis G carrying an arm H which is actedupon by the cam D and a spring controlled arm I; The throttles for the two large carbureters A are'at this moment com-' pletely closed. They are opened later on by a stud E provided on the cam D and which is connected to an arm L bureter units A, A. By means of said arrangement, the throttles N, N of the main carburetors are opened later than the throttale? of the auxiliary unit and closed sooner,

into an elongated slot J formed running of the car when an additional air' valve is used, is still more advantageous in the case of carbureters the automatic regulation of which is efi'ected by regulating the flow of petrol.

In the case of a carbureter for a twelvecylinder engine, the hereinbefore described arrangement would comprise four carbureting units for high speeds situated together in the same piece, and a carbureting unit for low speeds. As already above mentioned, the devices for use when the engine is running dead slow would be situated on the low speed carbureter.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A carbureter for motor cars comprising in combination main admission pipes adapted to be connected to separate explosion cylinders, throttle valves in said admission pipes, a common actuating means for said throttle valves, a constant level fuel tank, fuel nozzles opening into said admission pipes, respectively, and in communication with said fuel tank, an auxiliary carbureter adapted to feed the engine for moderate speeds said auxiliary carbureter comprising a mixing chamber connected to the main admission pipe: at a point between the throttles and the expiosion cylinders, a throttle in said mixing chamber, means for operating said throttle, a fuel nozzle opening into said mixing chamber and in communication with the said fuel tank, and a carbureter for dead slow running comprising a mixing pipe in communication with the explosion cylinders and a fuel nozzle opening into said mixing pipe and in communication with the said fuel tank.

2. A carbureter for motor cars comprislng in combination main admisslon pipes bureter adapted to feed the engine for moderate speeds, said auxiliary carbureter comprising a mixing chamber connected to the main admission pipes at a point between the throttles and the explosion cylinders, a throttle in'said mixing chamber, means for operating said throttle, a fuel nozzle opening into said mixing chamber and in communication with the said fuel tank, and a carbureter for dead slow running comprising a mixing pipe in communication with the said mixing chamber at a point between the throttle of the same and its point of connection with the main admission pipes and a fuel nozzle opening into said mixing pipe and in communication with the said fuel tank.

3-. A carbureterfor motor cars comprising in combination main admission pipes adapted to be connected to separate explosion cylinders, throttle valves in said admission pipes, a'constant level fuel tank, fuel nozzles opening into said admission pipes respectively and in communication with said fuel tank, an auxiliary carbureter adapted to feed the engine for moderate speeds, said auxiliary carbureter comprising a mixing chamber connected to the main admission pipes at a point between the throttle and the explosion cylinders, a throttle in said mixing chamber, means for operating in sequence the throttle in said mixing chamber and simultaneously the throttles in the main admission pipes, a fuel nozzle opening into said mixing chamber and in communication with the said fuel tank and a carbureter for dead slow running, comprising a mixing pipe in communication with the explosioncylinders and a fuel nozzle opening into said mixing pipe and in communication with the said fuel tank.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

AUGUSTE MAIRE,

Witnesses:

LoUIs Most), CHAS. P. PREssLY. 

